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Microchip Technology AT25HP512W2-10SI-2.7-T
- Part No.:
- AT25HP512W2-10SI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AT25HP512W2-10SI-2.7-T.pdf
- Description:
- IC EEPROM 512KBIT SPI 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,859
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Product details
Overview
AT25HP512W2-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 512 Kbit SPI serial EEPROM organized as 65,536 × 8-bit words, operating from 2.7V to 5.5V, supporting 5 MHz clock rate at 2.7V, and featuring hardware write protection via WP pin and block-level software protection (1/4, 1/2, or full array). It is used in industrial control modules for nonvolatile parameter storage requiring low-voltage operation and high reliability.
For engineers reviewing the AT25HP512W2-10SI-2.7-T datasheet, AT25HP512W2-10SI-2.7-T pinout, AT25HP512W2-10SI-2.7-T application, or AT25HP512W2-10SI-2.7-T equivalent, key selection considerations include its 16-lead JEDEC SOIC package, 128-byte page write mode only, 100K endurance cycles, >40-year data retention, and dual-voltage compatibility (2.7V/1.8V variants).
Technical Context
The AT25HP512W2-10SI-2.7-T implements a standard 3-wire SPI slave interface (CS, SCK, SI/SO) compliant with Modes 0 and 3, with separate input (SI) and output (SO) pins enabling full-duplex communication. Its internal architecture includes an 8-bit instruction register, status register with RDY/WEN/BP0/BP1/WPEN bits, and nonvolatile block protection configuration.
It supports suspend/resume of serial transfers via the HOLD pin (active-low, requires SCK low), and enforces write protection through both hardware (WP pin + WPEN bit) and software (WRSR-configured BP bits). All programming cycles are self-timed with no external erase step required, and page writes are strictly limited to 128-byte aligned boundaries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (65,536 × 8-bit words) - defines maximum persistent data capacity for firmware parameters or calibration tables. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct integration into 3.3V and 5V logic systems without level-shifting. |
| Max Clock Frequency | 5 MHz at VCC = 2.7V - determines maximum serial throughput (≈5 MB/s theoretical burst read, constrained by tWC). |
| Write Endurance | 100,000 write cycles - specifies guaranteed reprogrammability count before wear-out in field-deployed devices. |
| Data Retention | >40 years at TA ≤ 85°C - ensures long-term validity of stored configuration without refresh. |
| Page Write Size | 128 bytes only - mandates aligned multi-byte writes; single-byte writes are not supported and will overwrite prior page content. |
| Operating Temperature | –40°C to +85°C - qualifies for industrial-grade embedded applications including motor drives and PLCs. |
Pinout & Package
AT25HP512W2-10SI-2.7-T is packaged in a 16-lead JEDEC SOIC (package code 16S2), 0.300" wide body, gull-wing lead form, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-low enable; must be low to accept instructions; high impedance on SO when high. |
| 2 (SO) | Serial Data Output | Tri-state output for read data and status register contents; high-Z when CS high or during HOLD. |
| 3–4 (NC) | No Connect | Internally unconnected; must remain floating or tied to GND per layout guidelines. |
| 5–8 (NC) | No Connect | Unused pins in 16-lead SOIC variant; no internal connection; avoid routing signals to these pads. |
| 9 (WP) | Write Protect Input | Hardware lock: low + WPEN=1 disables all status register and protected memory writes. |
| 10 (GND) | Ground Reference | Primary return path for VCC and I/O; requires low-impedance PCB plane connection. |
| 11 (VCC) | Power Supply | 2.7–5.5V supply; bypass capacitor (0.1 µF ceramic) required within 10 mm of pin. |
| 12 (HOLD) | Serial Transfer Suspend | Active-low pause: halts ongoing SPI transfer without resetting address counter or state machine. |
| 13–14 (NC) | No Connect | Unbonded die pads; electrically isolated; leave unconnected per Microchip recommendation. |
| 15 (SCK) | Serial Clock Input | Synchronous timing reference; rising/falling edge behavior depends on SPI mode (0 or 3). |
| 16 (SI) | Serial Data Input | Instruction, address, and write-data input; sampled on SCK edge per SPI mode definition. |
Key Features
| Feature | Design Value |
|---|---|
| 128-byte Page Write Mode Only | Enforces efficient bulk writes but prohibits byte-level updates-requires full-page buffering in host firmware. |
| Block Write Protection (BP0/BP1) | Configurable via WRSR to protect top 1/4, 1/2, or entire memory array-prevents accidental overwrites of critical firmware sections. |
| Hardware + Software Write Protection | WP pin + WPEN bit enables dual-layer security: physical strap disables status register writes even if software configures BP bits. |
| HOLD Pin Functionality | Allows master MCU to pause EEPROM communication mid-transfer without losing address pointer or command state-critical for real-time interrupt handling. |
| Self-Timed Internal Write Cycle | Eliminates need for external timing control or polling delay loops; RDSR RDY bit indicates completion. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted thresholds in a temperature/humidity transmitter. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; accessed via SPI during power-up or recalibration. Use Value: Ensures consistent measurement accuracy across device lifetime using >40-year data retention and 100K endurance for periodic recalibration events. |
Use Scenario: Holding patient-specific therapy settings and safety limits in a portable infusion pump. IC Role / Device Role / Timing Role: Secure configuration storage with hardware write protection enabled to prevent runtime corruption during battery swaps or ESD events. Use Value: WP pin + WPEN bit blocks unauthorized writes to critical therapy parameters, meeting IEC 62304 Class B software safety requirements. |
| PLC I/O Module Firmware | Smart Energy Metering |
Use Scenario: Storing module identification, channel mapping, and diagnostic logs in a DIN-rail mounted programmable logic controller I/O expansion card. IC Role / Device Role / Timing Role: Persistent data logger and identity store; accessed during boot and fault recovery sequences. Use Value: 16-lead SOIC package fits dense industrial PCB layouts; –40°C to +85°C rating ensures operation in uncontrolled cabinet environments. |
Use Scenario: Recording tariff schedules, billing cycle counters, and tamper-event timestamps in a utility-grade electricity meter. IC Role / Device Role / Timing Role: High-reliability event logging memory; written once per billing period, read daily for remote reporting. Use Value: 100K write cycles exceed 20+ year field life requirement; 2.7V operation supports brownout resilience during grid instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95512-DRMN6TP/K | 512 Kbit SPI EEPROM, 2.5–5.5V supply, 10 MHz max clock, 8-lead SOIC package (smaller footprint than 16S2). | Lacks HOLD pin and NC pins; no suspend capability; different pinout prevents drop-in replacement. | Select when board space is constrained and HOLD functionality is unnecessary; verify WP logic compatibility. |
| AT25DF512C-SSHN-B | 512 Kbit SPI DataFlash® with internal page buffer, 2.7–3.6V only, 70 MHz max clock, 8-lead SOIC. | Uses DataFlash command set (not standard SPI EEPROM opcodes); incompatible instruction set and status register map. | Choose for higher-speed sequential writes; requires full firmware driver rewrite and layout change due to voltage and protocol mismatch. |
Compared with AT25HP512W2-10SI-2.7-T, M95512-DRMN6TP/K offers higher speed and smaller package but omits HOLD-critical for deterministic interrupt response-while AT25DF512C-SSHN-B provides faster throughput but demands complete protocol redesign and narrower voltage compliance.
Availability
AT25HP512W2-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and smart metering applications requiring stable component supply, long-life data integrity, and RoHS-compliant packaging.
Supply support for AT25HP512W2-10SI-2.7-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification programs.
The AT25HP512W2-10SI-2.7-T belongs to Microchip's legacy AT25HP serial EEPROM family, designed for cost-sensitive, high-reliability embedded systems needing simple SPI-based parameter storage with robust write protection.
FAQ
What is the correct SPI mode for AT25HP512W2-10SI-2.7-T?
The AT25HP512W2-10SI-2.7-T supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1). Mode 0 is most commonly used: data sampled on SCK rising edge, changed on falling edge. The device does not support Modes 1 or 2. Confirm mode selection in your MCU's SPI peripheral configuration before initializing communication with AT25HP512W2-10SI-2.7-T.
Does AT25HP512W2-10SI-2.7-T support single-byte writes?
No, AT25HP512W2-10SI-2.7-T supports only 128-byte page writes. Attempting a write of fewer than 128 bytes results in undefined content in that page. The device ignores partial-page writes and may corrupt adjacent data. Host firmware must buffer up to 128 bytes and issue full-page writes. This constraint is explicitly documented in the AT25HP512W2-10SI-2.7-T datasheet under "WRITE SEQUENCE".
How does the HOLD pin function on AT25HP512W2-10SI-2.7-T?
The HOLD pin on AT25HP512W2-10SI-2.7-T suspends ongoing SPI communication without resetting the internal address counter or command state. To activate, bring HOLD low while SCK is low; to resume, bring HOLD high while SCK remains low. During HOLD, SI is ignored and SO enters high-impedance. This allows an MCU to service interrupts without losing EEPROM transaction context-critical for real-time systems using AT25HP512W2-10SI-2.7-T.
What is the purpose of the WPEN bit in the AT25HP512W2-10SI-2.7-T status register?
The WPEN (Write Protect Enable) bit (Bit 7) controls whether the WP pin actively inhibits writes to the status register. When WPEN = 1 and WP = low, all status register writes-including BP0/BP1 and WPEN itself-are blocked. When WPEN = 0, the WP pin has no effect, allowing status register updates even with WP grounded. This enables safe field programming: AT25HP512W2-10SI-2.7-T can be installed with WP tied low yet retain configurability until WPEN is set.
Is AT25HP512W2-10SI-2.7-T pin-compatible with other AT25HP512 variants?
No-AT25HP512W2-10SI-2.7-T uses a 16-lead JEDEC SOIC package (16S2), while AT25HP512-10PI-2.7 uses 8-lead PDIP and AT25HP512C1-10CU-2.7 uses 8-lead Leadless Array. Pin count, pitch, and signal mapping differ significantly. The 16S2 package includes four dedicated NC pins (3,4,5,6,7,8,13,14) not present in 8-pin variants. Direct PCB replacement is not possible; AT25HP512W2-10SI-2.7-T requires its specific 16-lead footprint.
AT25HP512W2-10SI-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 10 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AT25HP512W2-10SI-2.7-T FAQ
1.How can I place an order for AT25HP512W2-10SI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25HP512W2-10SI-2.7-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25HP512W2-10SI-2.7-T reliable?
The price and inventory of AT25HP512W2-10SI-2.7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25HP512W2-10SI-2.7-T is usually 5 days.
3.What payment methods are accepted for AT25HP512W2-10SI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25HP512W2-10SI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25HP512W2-10SI-2.7-T?
AT25HP512W2-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25HP512W2-10SI-2.7-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25HP512W2-10SI-2.7-T?
For technical support, including AT25HP512W2-10SI-2.7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25HP512W2-10SI-2.7-T requirements.
6.How does Aetrix verify that AT25HP512W2-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT25HP512W2-10SI-2.7-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25HP512W2-10SI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT25HP512W2-10SI-2.7-T?
All AT25HP512W2-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25HP512W2-10SI-2.7-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25HP512W2-10SI-2.7-T part is unused and in its original packaging.
Return procedure for AT25HP512W2-10SI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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